Release 1.2.1

require "text" now works again to load all components.

Bump version to 1.2.0 for clarity

There is an old, outdated Text gem on rubygems.org. It's from the same
codebase, but hasn't been updated since 2007 and won't work on Ruby 1.9. For
reasons unknown, however, it has a higher version number. In order to avoid
confusion, make sure that text (lower case) is obviously the newest code.

Version 1.0.4

* Eliminate warnings from each_with_index with one parameter
* Make White Similarity work in Ruby 1.8.6.